Add tum.edu as alias for tum.de (apple#669)

tum.edu is used for eaccess.tum.edu ever since HSTS is enabled for tum.de

Author: jpbernius

quirks/shared-credentials.json

@@ -242,7 +242,8 @@
             "lrz.de",
             "mwn.de",
             "mytum.de",
-            "tum.de"
+            "tum.de",
+            "tum.edu"
         ]
     },
     {

quirks/websites-with-shared-credential-backends.json

@@ -439,7 +439,8 @@
         "lrz.de",
         "mwn.de",
         "mytum.de",
-        "tum.de"
+        "tum.de",
+        "tum.edu"
     ],
     [
         "lufthansa.com",